1. Department of Neurology; Radboud University Medical Centre; Nijmegen the Netherlands
2. Department of Genetics; Radboud University Medical Centre; Nijmegen the Netherlands
3. Department of Laboratory Medicine, Laboratory of Genetic, Endocrine and Metabolic Diseases; Radboud University Medical Centre; Nijmegen The Netherlands
4. Department of Pathology; Radboud University Medical Centre; Nijmegen The Netherlands
5. Department of Pathology; Maastricht University Medical Centre; Maastricht The Netherlands
6. Department of Paediatric Neurology, Neuromuscular Service; Evelina Children's Hospital, St Thomas' Hospital; London UK
7. Randall Division for Cell and Molecular Biophysics, Muscle Signalling Section; King's College; London UK
8. Clinical Neuroscience Division, IOP; King's College; London UK